Company lists · Data verified August 2026

Top 25 Antitrust law firms based in the United States

Name: Antitrust law firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 757 companies tracked

There are 757 antitrust law firms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 33,610 professional contacts across them, including 20,318 with verified work emails and 18,064 with mobile numbers. New York is the largest hub.

This list covers antitrust law firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

757Companies

33,610Contacts tracked

20,318Verified emails

18,064Mobile numbers

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The 25 largest antitrust law firms based in the United States

Ranked by team size

Top 25 of 757 antitrust law firms based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Arnold & Porter	Washington, DC	1,001-5,000	2,324	1,648
2	Seyfarth Shaw LLP	Charlotte, NC	1,001-5,000	2,176	1,292
3	Dechert LLP	Philadelphia, PA	1,001-5,000	2,056	1,116
4	Faegre Drinker	Scottsdale, AZ	1,001-5,000	1,827	1,444
5	Venable LLP	Washington, DC	1,001-5,000	1,791	1,184
6	Ballard Spahr LLP	Washington D.C., DC	1,001-5,000	1,720	1,097
7	Crowell & Moring	Chicago, IL	1,001-5,000	1,626	1,053
8	Clark Hill LAW	Grand Rapids, MI	1,001-5,000	1,355	836
9	Brownstein Hyatt Farber Schreck	Las Vegas, NV	501-1,000	896	617
10	Adams & Reese	Washington, DC	501-1,000	766	356
11	Kelley Drye & Warren LLP	Los Angeles, CA	501-1,000	686	450
12	Parker POE Adams & Bernstein LLP	Charlotte, NC	501-1,000	578	485
13	Wiley Rein LLP	Washington, DC	501-1,000	576	395
14	Miller Canfield	E Cleveland, OH	201-500	543	285
15	Keystone	New York, NY	201-500	414	6
16	Mcdonald Hopkins LLC	Columbus, OH	201-500	402	277
17	Robbins Geller Rudman & Dowd LLP	Washington, DC	201-500	339	220
18	Post & Schell, P.C	Wheeling, WV	201-500	335	182
19	VON Briesen & Roper, S.C	Madison, WI	201-500	326	210
20	Dickstein Shapiro LLP	Washington, DC	501-1,000	292	52
21	Econic Partners, LLC	Los Angeles, CA	201-500	271	181
22	Hausfeld	Washington, DC	201-500	267	207
23	Riker Danzig LLP	New York, NY	201-500	266	211
24	Keating Muething & Klekamp PLL KMK LAW	Cincinnati, OH	201-500	259	165
25	Saxton & Stump	Stewartstown, PA	201-500	257	134

Showing 25 of 757 antitrust law firms based in the United States

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Antitrust law firms based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 74 HQs

18,064Contacts with mobile numbers

95Emails re-verified in last 30 days

Companies by employee count

1-10

456

11-50

195

51-200

201-500

501-1,000

1,001-5,000

10001+

Antitrust law firms by metro

Metro	Companies
Antitrust law firms in New York	74
Antitrust law firms in Washington	51
Antitrust law firms in Los Angeles	32
Antitrust law firms in Chicago	21
Antitrust law firms in Houston	18
Antitrust law firms in San Francisco	17
Antitrust law firms in Dallas	17
Antitrust law firms in Boston	14

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “antitrust law firms”, with match quality audited by blind human judging, and headquartered in the United States.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Contact records re-verify on a rolling cadence; 95 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many antitrust law firms are there based in the United States?

There are 757 antitrust law firms headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Arnold & Porter, headquartered in Washington, tops this list with the largest team on record.

Which city has the most antitrust law firms?

New York leads with 74 headquartered companies, followed by Washington (51) and Los Angeles (32).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 20,318 verified decision-maker contacts tracked across these 757 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph, the same data that powers RevenueBase's B2B data products and the free research portal.